True or false. Diluting may exclude some bacteria that are low in numbers.
Enrichment media is used to
Enrichment Media characteristics:
Selective Media characteristics:
Differential media characteristics:
Nutrient Agar is
Nutrient agar contains:
Mannitol Salt Agar characteristics
What is phenol red?
good growth no color change
Yellow growth or halo
Red growth (no halo)-growing well
True or false. Any yellow color is from the metabolizing of the mannitol and creating an acid.
Mannitol salt fermentation
EMB is used for the
EMB is differential for:
Which organism ferments lactose aggressively and doesn't turn pink due to the aggressive fermentation but metallic green or black.
growth is dark with or without metallic sheen
growth is colorless (no pink, no dark or metallic sheen)
EMB plate is selective against ________ and differential for _______ and _________.
MC agar is differential
pink to red growth with or without bile precipitate
The procedure for exercise 12:
4 different agar plates for the known bacteria: Ps. aeruginosa, staph aureus, staph epidermidis, E-coli
4 different plates for the unknown bacteria: mixed culture
Section each plate off in 1/4s and streak each one with a different microbe (for each diff. agar)
For the other 4 plates streak the plate with a different microbe
What is the purpose of peptone in the agar?
Nutrient agar that contains vancomycin is